Couple of comments:
Wire the buzzer in parallel with the dash turn signal light on the old cars.
For the later cars with 2 dash lights, get 2 buzzers .
This one comes with a built-in volume control at $4.95 US:
http://www.allelectronics.com/make-a-store/item/SBZ-365/4-28-VDC-PIEZO-BEEPE
R-W/VOLUME-CONTROL//1.html
<http://www.allelectronics.com/make-a-store/item/SBZ-365/4-28-VDC-PIEZO-BEEP
ER-W/VOLUME-CONTROL/1.html>
Evidently they're also called 'beepers'
--
Steve Gerow
Pasadena, CA, USA
BN6
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